Flush cylinder tubular night latch



July 21, 1953 A. ERKKILA FLUSH CYLINDER TUBULAR NIGHT LATCH 5 Sheets-Sheet 1 Filed April 24. 1947 2 5 BMw m w .1. m I 1 a. b w. m 6 J m 1 fiw m 5 r 1 1w 5 C m 7 DIIZ 5 l 7 n 4 7 M I 9 w T" a T 6 u 5 w a my M w 0 OJ 4m INVENTOR Andrew EMU la ATTORNEY y 1953 A. ERKKILA 2,645,926

FLUSH CYLINDER TUBULAR NIGHT LATCH Filed April 251, 1947 5 Sheets-Sheet 2 0 f 1: Z. 38 34 4O INVENTOR Andrew EPHHila A/ATTORNEY July 21, 1953 A. ERKKILA FLUSH CYLINDER TUBULAR NIGHT LATCH 5 Sheets-Shea- 5 Filed April 24. 1947 INVENTOR Andrew Enhldi la B'Y s V ATTORNEY 1% ff U 2 T [W M m m w 6 1 f w n w n r w1m m Hm Patented July 21, 1953 Andrew Erkkila; Fitchburg, Mass, assignor to Independent Lock Company, Fitchburg, Mass a corporation of Massachusetts Application April 24, 1947', Serial No". 743,564.

7' Claims. (01. 70-151) This invention relates to tubular latches and more particularly to latches and actuating means therefore, and still more particularly, to escutcheon construction for coupling key operated actuating means with tubular lock mechanism to manipulate the bolt thereof. 7

It is an object of my invention to provide for closures, doors or the like, locks including tubular casings which may readily be mounted in position by simple boring operations including such tubular latches which are spindle operable, to re-' tract a latch bolt or a dead bolt from the inside of the door, and is key operable from the outside of the closure or door through the medium of a key cylinder which may be positioned flush with. the door frame facing. g I I It is further contemplated by my invention to provide a lock of the type where the key operated cylinder and lock casing. are fitted. in borings transversely and edgewise of the door frame inoffset position, employing. key operation of the cylinder from-the exterior to operate the bolt.

mechanism for retracting a spring projected latching bolt or projecting and retracting a dead bolt operating mechanism through a spindle coupled to a turn. knob on the interior of the door. v

Specifically, it is contemplated by my invention to provide a coupling between the key plug assembly of a cylinder lock andv the spindle of a lock which is positive in operation and. is easy to adjust and maintain or set in servicing.

Known to me is the provision of door'locks employing mortice lock casings or tubular lock casings in which the key operated lock cylinder assembly and lock casing are 'mounted on the door frame in staggered intersecting position, to be applicable to thin doors while positioning the cylinder face and escutcheon therefor, substantially flush with the outside of the door. In such mechanism,actuation of the bolt may be. effected by an inside turn knob directedinto the lock-casing. Coupling of the movement of the cylinder to the bolt spindle may be eifected directly inthe casing or through a connecting channel in the door frame or lock casing The latter assembly does not require morticing of the door as does the former' to join the passages between the casing The setting of; such mechanism ordinarily re--- quires unusual attention and skill by the installer,

to'provide for proper throw and retraction of the,

bolt and to indicate in a measure the positionof the bolt by the position of the cross head of the knob.

provide flush cylinder key operating mechanism for locks in which the coupling between the cylinder plug bar and the spindle for the latch bolt.

for transmitting movement of the. cylinder plug. to the spindle may be effected with certainty of positioning for mounting Of. the lock. mechanism, and thereby minimize the installers labor. Still more particularly, it is arr object of my invention to provide a coupling between a cylinder and lock I mechanism which is positive in operationfor setting the lock mechanismand is installed without special morticing of the door frame.

Still more particularly, it is an. object of. my

invention to provide a coupling between the cylinder and bolt actuating spindle in which independent movement of the. bolt and bolt operating mechanism does not disali'gn the coupling between the cylinder and the spindle for actuate ing. the bolt mechanism.

Still more particularly, it is an object ofmy invention to provide a coupling mechanism, in a lock of the character. described, between the key operated cylinder plug andthe spindle for the lock. whereby spring projected, as well as hold back. and dead bolting bolts may be employed, without; disaligning the coupled mechanism.

Still more particularly, it is an object of my invention. toprovide tubular lock mechanism for latch boltswhich. are spring projected and which may be dead bolted by the'inclusion of auxiliary latchbolts andincludes. features whereby the spring projected latch bolt may be set in. the hold back: position, and: including coupling. means between the key operated cylinder plug and the spindle of the lock mechanism which minimizes chance disalignment of the mechanism parts in installation or in operation. s

To attain these objects and such further objects as may appear herein, or be hereinafter pointed out, I make reference tothe accompanying: drawing, formingapart hereof, in which- Figure 1- isa sectional view through a door frame-including a-Iock in'accordance with my invention Figures 2; 3', and 4 are elevational' views through the escutcheon plate, with the mechanism in different positions;

Figures 5 and 6 are perspective views of the Accordingly, it is an object of my invention to" I Figure 13 is a section showing .theilatchandjree tractor in the hold-back position; Figure 14 is a similar view, showing the latch bolt retractor mechanism in thespririg project able position;

Figure 15 is a side elevation of a dead but a bular lock;

Figure 16 is a similar view, with one casing section removed to show the internal mechanism;

Figure 17 is a view similar to Figure 16, with the bolt retractor mechanism turned to retract the bolt;

Figure 18 is a section taken on the line |8-|3 of Figure 15.

Making reference to the drawing, my invention is illustrated in connection with a door frame If! which is provided with a boring running edgewise from the end of the doorfor receiving the lock casing I2, and a transverse boring l3 for receiving a key operated cylinder assembly H. The cylinder assembly M has its outer flange i5 centered and seated in the escutcheon l 6 on the front or outside face of the door frame. The key plug H has its rearwardly projecting extension l8 projecting into the cup-shaped collar I9 and keyed. thereto by the cross pin 20, for rotation therewith, the collar being provided with an outwardly turned flange 2 I, having shoulders 22 and 23 arouately spaced around the cup-shaped collar l9. A stop pin 24 is provided on the cylinder assembly M to limit the angle of rotation of the plug;

The collar I9 is provided with an end flange 25, encasing the plug head 26 for rotation Within the collar. The plug head 26 is formed with a neck 21, from which extends the turnbar 28, preferably made of square metal stock. A cross pin 29 on the neck 21 may be engaged by the shoulders 3|! and 3|, to drive the turn bar 28, upon rotation of the collar l9, when key operated by the key plug |1.

It will be observed that within the limits of an arc corresponding to the spacing between the shoulders and 3|, the turn bar 28 is independently revoluble so that no transmission occurs between th cylinder plug l1 and the turn bar 28 unless the pin 29 is in engagement with either shoulder 30 or 3|, and conversely, when the key plug H is immovable, the turn bar 28 is free to revolve in an arc defined by the spacing between the shoulders 30 and 3|, and an arc defined by the spacing between the shoulders 22 and 23, for purposes which will appear more clearly as this description proceeds. I r

The turn bar 28 is arranged to extend through the hub 32, trunnioned in the plate 33. Screws 34 are directed through borings in the plate 33, to engage the threaded borings 35 in the usual lugs 36, mounted on the cylinder assembly l4, thereby drawing the cylinder firmly in position seated in the escutcheon |6 with regard to the front face of the door frame 0.

1o cessing or countersinking the screw heads in the The hub 32 has a square keyway 31, to receive the turn bar 28 in keyed engagement. The hub 32 is provided with an extension finger 38, to the end of which there is pivotally attached the link 39 by the cross pin 40, the cross pin being headed or expanded to hold the link pivoted to the extension finger 38 pivotally mounted thereon. a 1

It will be understood that the extension finger 38 may clear the head of the screws 34 by replate 33, in a manner well understood, in order to offer noobstruction in the path of rotation of the hub and its extension finger 38.

' The plate 33 is also provided with a spindle hub 4|, having an extension 42 overlapped by the end 43 of the link 39, a cross pin 44 being headed to pivotally unite the extension 42 and the link 39.

- The hub 4| is formed with a square keyway 45 to receive, in keyed engagement, the turn knob spindle 46.

I prefer to pre-assemble the turn knob spindle 46 with the turn knob 41 (which is oval shaped) and the escutcheon 48. Accordingly, the turn knob spindle 46 is provided with a neck 49, entering the shank 50 of the turn knob 41, the shank being trunnioned in the escutcheon 48, sleeved over the extension 49 and united thereto by a cross pin 5|. A split ring 52 is encircled about the shank 59, in a groove adjacent the cross pin 5|,

" to hold the turn knob shank revolubly anchored in the escutcheon 48. The 'esc'utcheon may be affixed in position by the fastening means comprising the screws 53. The turn knob spindle is thereby coupled with the hub 32, actuated by the turn bar 28 which, in turn, has rotary movement imparted to it, within limits, by the cylinder plug l1 and the collar assembly I9 for the bar 28.

From an inspection of Figures 2, 3 and 4, it will be observed that with the turn knob spindle 46 keyed into the hub 4|, clockwise rotation of the hub 4| will draw the hub 32 with it by reason of the coupling provided by the link 39. The limiting position for clockwise rotation of the turn knob 41 is eifected by engagement of the link 39 with the shank =50 engaging the spindle 46. Likewise, should the turn knob be revolved counter-clockwise, as shown in Figure 4, the engagement of the back of the link 39 with the shank 50 engaging the spindle 46 will limit the counter-clockwise rotation of the turn knob 41.

The radial displacement of the extensions 38 and 42, respectively, is adequate to limit the turn knob to movement of the coupled hubs to retractor operation of a latch bolt and dead bolt hereinafter to be described, by counter-clockwise or clockwise rotation thereof. The curvature of the link with respect to the spindle 46 passing through the keyway 45 is adequate to limit the movement clockwise or counter-clockwise when the link abuts the shank 50, thereby precluding a passed-dead-center position of the cross pin 44 with regard to the cross pin 40.

The relationship of the escutcheon assembly and the coupling of the hubs 32 and 4| will appear hereinafter.

The tubular lock casing l2 includes an end plate 54 to which, the rear casing segment 55 is attached by a liner plate 56, having upstruck guide fingers 51 adjacent the bolt aperture 58.

The.end plate metal is spun to define the screw attaching apertures 59, as well as to rivet the liner plate thereto. The semi-cylindrical casing segment is thereupon screwed or otherwise attached by fasteningmeans internesting the neck of the casing and guide fingers 51.

I provide an auxiliary latch B l, which: is guided at one end in the bolt aperture 58 byshaping the casing 55- to conform thereto. The opposite end includes a shank comprising the upper branch 62 and the lower branch 63, spanning a guide rod 84, whose end 65 is afiixed in the crotch of the bifurcation formed by the branches 62 and 83. The opposite end 66 is slidably guided in the crossbar 61 whose ends are anchored in the casing segments 55 and 55ato offer the abutmerit for the expansion spring 68, which is coiled about the guide rod 64, normally to project the auxiliary latch 6| outwardly. A camming pin 69 extends transversely of the branch 62, for purposes which will appear hereinafter. I

A. latch bolt I0 overlies the auxiliary latch 6|, to project through the bolt aperture 58. The latch bolt is carried by a. shank 1 I, having bifurcated branches 12 and I3, each formed with sliders 14 and 15 extending into guide. slots 16 and 11, respectively, in the casing segments.

The shank branches 12 and 13 are joined by a cross web 'l'Bxwhich may span the crossbar 61 carrying a guide bar 19 for the coiled spring 80, to engage the shoulder 8| of the latch bolt nose 10, thereby spring projecting thelatch bolt 19 through. the bolt opening 58.

Rearwardly, the branches 12 and 13 of the shank 1| are provided with guide edges 82 and 83, spanning the neck of the hub 84 which is revolubly: mounted in the bearing 85, struck up from the body of the casing segment 55.

The hub 84 carries a retractor 86.. The retractor 86 has. a shoulder 81 to engage the stud pin element 88 on the branch I2 of the latch bolt shank for clockwise rotation of the hub 84. The retractor has a camming cutout. 8.9 ofgen'eral V-shaped contour adjacent the periphery thereof, and. within which may lit the finger 98 of the pawl 9|, which is pivotallycarried on the pin 92, which is directed through the branch 12 of the latch bolt shank, and terminates into a bearing 92a, A slot 92b, formed in the branch I2, guides and permits the bolt shank to slide back and forth within the limits of extension of the slot.

The pawl 9| has a dogging nose 93. formed to engage a stud 94 on the latch bolt shank. A guiding edge 95 may engage the pin 89, to guide the dogging nose 93 out of the path of engagement with the stud 94, when the auxiliary latch BI. is in the projected position. A spring 98 has a loop 91 mounting the same on the pin. 92. The ends 98 and 99 bear onthe pawl 9| and hub 84, re-

spectively, normally to urge the dogging nose gaged by the pin 69 for tripping the pawl from the stud engaging position shown in Figure 12,

when the auxiliary latch 6| is depressedto a position projecting the nose 93 clear of the path of the I ming face IOI merges into a peripheral bearing surface I03 which is curved outwardly at I84 to form a stop seat, as will appear hereinafter.

The tubular casing is completed by the semie circular complementary section 55a. A cap I85,

formed with a bayonet'slot I88 serves to hold the two'halves. of the casing ,55 and 55a at the cylindrical portion; I101; by a partial.rotary 111.09%.

clockwise, to have the face 89a cam the branch- 98 away from it, to pivot the pawl 9| ina clockwise direction and move the nose- 93 out of the path of the lug 94. As rotation is continued the shank pin 88 is engaged to withdraw the latch bolt. Upon movement of the shank, shoulder 8| of the latch bolt 10 engages an offset shoulder I08 of the auxiliary latch 6|, toretract both they latches I8 and BI in unison. A finger M811. is directed against the branch 13 of the shank to keep the two shanks in parallelism.

The web 18 abuts against the crossbar 81 to restrain the latch bolt to the limited outward projection by the spring 80. The offset shoulder I08 engages the latch bolt shoulder 8| to restrain outward projection of the auxiliary latch 6|. The latch bolt, auxiliary latch, crossbar and their respective springs may be assembled and inserted as a unit into the casing.

When mounted in a door or like closure, the latch bolt may be independently depressed as the latch bolt camming face 10w strikes the strike plate 10b in the door frame. aperture is not large enough to receive both the latch bolt and the auxiliary latch in the depressed position, as shown more clearly in Figure 12, thereby depressing. the pin 89 and sliding it away from the face 95, to permit thespring 98 to direct the pawl nose 93 rearwardly of the lug 94', therebydead-bolting the latch bolt 18% Upon counterclockwise rotation of the spindle 46, when viewed as in Figures'lo to- 1-2 the retractor surface 896 engages the pawl98; to tilt the'pawl 93 out of the path of the lug 94, as in the previously described operation. As the retractor 86' continues in its movement, the camming surface IEH en gages the retractor pin I82, to withdraw the latch bolt out of the strike aperture; the peri'p'l'iery of the retractor beyond the surface 895 holding the pawl out of engagement with the lug 94-. Continued rotary movement of the'retractor 8'6 brings the seat I84 into contact with the retractor pin I82, so that the limit of eccentricity of the edge I03 (see Fig. 10) of the camming surface |8| is passed the dead center with respect to the axis through the hub 84, the dead center position being intended to mean an aligned position of the three elements, to wit, the center of the pin I02, the point of contact of its periphcry with the edge I03 and the center of the retractorv 86. The pressure of the spring 88 holds the latch bolt in the retracted position sincethe bolt spring pressure exerts a turning component on the retractor in the direction in which the retractor is being turned and acts as a detent.

In a clockwise movement of the retractor to the limit of position as shown in Figure 14, it will be observed that the camming face 81 with relation to the pin 88 never reaches a passed-dead center position so that the projection by thespring 88" is possible. The lock mechanism. therefore has the feature of .hold-back of the latchbolt and, auxiliary latch bolt in a counter-clockwise:- rota tion of the spindle 46 from the interior of the door as viewedin Figures 10-to 14, with no: holdknob 41 in, aclockwise direction.

The strike plate- 1 Where actuation ofthe lock mechanism is by the key K from the outside of the door, rotation of the rearwardly projecting extension I8 carries with it the collar I9 by the keying engagement effected by the cross pin 20 within the limits of the spacing between the shoulders 22 and 23 with respect to the pin 24. The turn bar 28 will be moved, depending upon the position of the pin 29 with relation to the shoulders 30 and 3| on the collar I9.

Upon clockwise rotation of the key, movement of the rearwardly projecting extension I8 is prevented by the shoulder 22 engaging the pin 24. Counter-clockwise rotation of the key will cause rotation of the extension I8 within the limits of the distance between the shoulders 22 and 23, to engage the pin 24. The counter-clockwise movement of the key by one standing on the key side of the door thereby moves the turn bar 23 in a clockwise direction, as viewed in Figures 2 to 4, to likewise transmit clockwise rotary movement to the hub 4|. This, in turn, will withdraw the bolt by the turning movement of the hub 84 from the position of the bolt shown in Figure 12 to the position of the bolt shown in Figure 14. During this manipulation, the coupling for the links 32 and 4| moves from the position shown in Figure 2 to the position shown in Figure 3. The limiting position under this mode of operation is where the link 39 engages the shank 5. of the spindle 46, which projects through the hub 4 I.

For knob operation in the clockwise direction, as viewed in Figure 3, retraction from the position shown in Figure 12 to the position shown in Figure 14 is accompanied by a movement of the coupling between the hubs 32 and 4| in the escutcheon from the position shown in Figure to the position shown in Figure 3. The unstable position of the pin 88 with respect to the surface 81 permits of immediate spring projection when the knob 41 is no longer manually restrained.

A clockwise rotation of the knob 41 will result in a change from the position shown in Figure 12 to that shown in Figure 13, causing movement of the coupling housed within escutcheon to the position shown in Figure 4. overturning beyond the position shown in Figure 4 is again prevented by the link 39 which is brought into engagement with the shank 53 of the spindle 45, to cooperate with the camming surfaces Ill-3 and I04, to hold back the latch in the fully retracted position.

By the construction thus described, the same lock mechanism is available for use as a spring projected latch, as a dead-bolting latch, or as means to hold back the spring projected latch in the fully retracted position.

It will likewise be observed that the coupling between the hubs 32 and 4 I, through the turn bar and the lost motion connection with the cylinder plug, permits operation of the inside turn knob 41 without influencing the cylinder mechanism.

While I have shown and described a tubular lock and operating mechanism therefor, employing a spring projected latch bolt including an auxiliary latch for dead-bolting the latch bolt, it will be understood that the auxiliary latch mechanism may be omitted, and the features of retraction and hold-back of a single spring projected latch bolt may be secured by the elimination of the retractor coupled dogging member or pawl 9|. It will also be understood, under such mode of operation, that the pawl camming means in the form of the cam surfaces 89a and 891) may be omitted or remain inactive. Thus, by retaining the camming face Illa on the latch bolt, and the elimination of he auxiliary latch GI and the pawl or dogging mechanism 9 I, the dead bolting mechanism only will be rendered inactive.

Where, however, a dead bolt is desired I may employ an assembly embodying some of the above features, as more clearly illustrated in Figures 15 to 18.

In such construction, the end plate 54 and back casing segment 55 are employed. There is provided, however, a dead bolt IIIb which is slidably extended from the bolt aperture 58 and the guiding section 51. The bolt has a shank I09, one end of which is headed in the bolt, the opposite end of which includes the bifurcated sections I I0 and III which corresponds to the sections I2 and I3 previously described, which span the hub II2. Sliders H3 and H4 are guided in slots adjacent the parting segments of the casing sections 55 and 55a. A trunnion pin II5 pivotally supports the dogging member or pawl I I6 and also passes through the guide slot I I! in the shank segment III]. The slot III is extended within the limits of the throw of the bolt inwardly and outwardly, as will be apparent as this description proceeds.

The hub I I2 is formed with a retractor flange I I8 and has a camming slot ||9 spanning the pin I20, riveted to the bolt shank segment III]. The hub I I2 is formed peripherally with bearing portions to trunnion the hub in the bearing portions I2 I, formed in the casing segments.

Axially, the hub is formed with a keyway I22, preferably of square cross section, to receive a spindle of a turn knob, such as 46, described in the prior embodiment. The retractor flange H8 is formed with a camming prepiheral segment I23, lying in the path of the short branch I24 of the dogging member I I6.

Normally, a spring I25 mounted on the pin I I5 has one end I26 anchored on the huh I I2 and the opposite end I21 adjacent the nose I28, to pivot the nose I28 axially against a limiting pin I29 and behind the lug I30, struck up from the latch bolt shank to dog the dead bolt.

For retraction of the bolt upon clockwise rotation of the retractor flange II8 through the turn knob spindle, the initial action of the retractor flange is to cause the camming portion I23 to engage the branch I24, and to pivot the same in a clockwise direction, tilting the nose I28 from behind the lug I30. Continued clockwise rotation of the retractor flange will withdraw the shank and the bolt it carries rearwardly.

I prefer to indent the casing segment 55a with an inwardly directed protuberance I3I. Cooperating with this indented portion, I provide a leaf spring I32, one end I33 of which is attached to the latch bolt shank. The other end I34 presses against the side wall of the casing segment 55, to ride upon the section I35 in the retracted position of the latch bolt, or to climb up on the indented portion I3I in the projected position, the indented portion I3I and the finger I32 providing a detent for the latch bolt, to seat the latch bolt in the retracted position or in the projected position, without lost motion. Other detenting means will readily occur to the skilled worker.

As in the prior embodiment, the casing segment 55a engages the struck up finger I36, to hold the casing segment adjacent the forward end of the end plate. A cap I05a engages the cylindrical end III! of the casing segments, and closes the casing by the bayonet slot and pin I 06 and Na, respectively, to join the casing segments.

As in the prior embodiment, the escutcheon plate 33 carrying the coupling more specifically 11.

lustrated in Figures 2 and 4 is available for transmitting the rotary movement of a key. operated cylindrical lock plug to the spindle passing through the hub 12, for operating-the retractor carried thereby. The limiting movement for projection, asshown in Figures and 16, or retraction, as shown in Figure 17, is accompanied by a positioning of the hubs 38 and 4| and the intermediate link 39, as more clearly described and illustrated in connection with Figures 2 to 4.

It will thus be observed that a novel tubular lock assembly has been provided, particularly suitable for exposing the cylinder lock escutcheon plate flushwith the door facing, and which may be mounted upon the door simply by a transverse and edgewise boring, requiringlittle or no morticing operations.

The escutcheon assembly, for coupling the movement of the cylinder plug and the interior turn knob spindle, is of positive action and assures an easy installation, without special care in orienting the hubs of the cylinder lock, and the spindle 46 passing through the lock casing.

With an assembly comprising the escutcheon plate 33 and the escutcheon cover 48, disalignment of the hubs 32 and 4| is avoided, as will be clear from the limiting positions of the link 39 as appearing in Figures 3 and 4, wherein this link abuts the shank 50 of the spindle 46 in either limiting position thereof.

It will further be observed that while I prefer to combine all of the desirable features in either the auxiliary latch and coupling assembly of the escutcheon or in a dead bolt tubularlock and coupling assembly of the escutcheon, separate features of my invention have utility, and my invention is to be limited only by the appended claims.

Having thus described my invention and illustrated its use, what I claim is new and desire to secure by Letters Patent, is:

1. In a door lock having a tubular casing and including a bolt projectible therefrom and retractable therefrom to a hold back position, said casing on one side having a turn knob and a turn knob operated spindle member coupled to retractor means in the casing for retraction of the bolt and said spindle member being rotatable within limits in its coupling with the retracting means to retract the bolt to the hold back position, the U combination therewith of retracting means operable from the other side ofthe casing comprising a turn bar member having its center line extending in. a plane offset from the center line of said turn knob and located on the same side of the said casing as said turn knob, a key controlled plug for said turn bar member, coupling means between said turn bar member and plug having a lost motion connection, means for journalling said turn bar member and spindle member comprising aligned hubs keyed, respectively, to said members, linking means coupling said hubs with each other in all bolt projected, retracted and hold back positions and ofiset from the axes of said hubs, a portion of said linking means, upon rotary movement of said hubs, traversing said axes, said turn knob spindle extending in the path of said linking means to limit the rotary movement of the hubs with respect to each other.

2. In a door lock having a tubular casin and including a bolt projectible therethrough, said casing having on one side a turn knob and turn knob spindle member, retractor means in said casing to which said spindle member is coupled, said retractor being rotatable within limits in its I0 coupling-toretract the bolt to the hold back position; thecombination therewith of a second retractor operator meanscomprising a turn bar member having-its 'centerline extendingin a plane :ofiset-irom. thercenter. line of said turn knob spindle member and accessible from the other side .of; said casing, a key controlled plug for'said turn bar, coupling means between said tum bar :andrplughaving a lost motion connec tion, means" for ijournalling said turn bar memher and; spindle izmembercomprising hubs, an escutcheon hailin -shearing means for said hubs, said hubs being-adapted tobe keyed, respectively; to: :said members," extensionfinger means F on said hubs, link means connecting said exdle member extending in the path of said linking means to limit the rotary movement of the hubs with respect to each other.

3. In a door lock in accordancewith claim 1 wherein said lost motiion connection comprises a cup-shaped collar mounted on the plug and in which said turn bar is journalled, and stop means on said collar comprising shoulders radially spaced from-each other, and having a pin on said turn bar for selective engagement thereof with one of said shoulders of said collar, whereby the turn knob member may be operated independently of the position of the key plug.

4. In a tubular lock, a tubular casing comprisinge a front section and a rear section partitioned longitudinally thereof, a bolt, a shank disposed rearwardly of said bolt including sliders, slots adjacent said segments formin guides for said sliders, a hub journalled in said casing sections, a retractor mounted on said hub, a pair of retractor pin elements carried by saidshank selectively engageable by said retractor, a dogging member pivotally mounted in said casing having a dogging nose for engaging an abutment of said shank, said dogging member including a camming finger and said retractor having a, plurality of camming portions whereby, upon initial rotation of said retractor, said dogging member will be disengaged from said abutment and the retractor will engage one of said retractor pin elements to retract the bolt and said retractor, including a second cam engaging the other of said retractor pin elements to hold said shank in the hold back position. I

5. In a door lock in accordance with claim 4 wherein said retractor may swing rotatively in clockwise or counter-clockwise direction for (retraction of the bolt, said retractor having a, cam-' ming portion which, in an over-center position thereof, engages a pin element and a further portion of said retractor is provided with a retractor pin seat to hold the bolt retracted. p

6. In a lock in accordance with claim 4 wherein said bolt is spring projected and said retractor may swingingly rotate for retraction of the bolt in clockwise or counter-clockwise direction,

the retractor camming portions being located with respect to one of said pin elements initially to cam the bolt to the retractor position and in an over-center position of the retractor to locate another portion formed with a retractor pin seat to engage the pin element and hold the bolt retracted.

7. In a lock in accordance with claim 4 where- 11 in said bolt is spring projected and has a cooperatively connected auxiliary latch bolt and pawl assembly for dogging said bolt in the projected position when the auxiliary latch is in the retracted position, and wherein said retracwr may rotatively swing for retraction of said bolt and auxiliary latch bolt in either a. clockwise or counterclockwise direction, said pawl having a tripping portion, and said retractor camming means includes a portion engaging said tripping portion of said pawl whereby, upon swinging of said retractor, the bolt is withdrawn and the bolt tripped to the undogged position and in an overcenter position of the retractor, a camming por- 12 tion on said retractor engages the pin element of said shank to hold both bolts in the retracted position. ANDREW ERKKILA.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 689,334 Taylor Dec. 17, 1901 919,919 Towne Apr. 27, 1909 1,707,413 Pendleton Apr. 2, 1929 2,124,897 Shaw July 26, 1938 2,266,106 Voight et a1. Dec. 16, 1941 

